<%
const { apiConfig, generateResponses, config } = it;
%>

import { message as alert } from "ct-mui";
import { notFound, redirect } from 'next/navigation';
import { getServerHeader, getServerPathname, getServerSearch } from '@/utils/getServerHeader';
export type QueryParamsType = Record<string | number, any>;
export type ResponseFormat = keyof Omit<Body, "body" | "bodyUsed">;

export interface FullRequestParams extends Omit<RequestInit, "body"> {
  /** set parameter to `true` for call `securityWorker` for this request */
  secure?: boolean;
  /** request path */
  path: string;
  /** content type of request body */
  type?: ContentType;
  /** query params */
  query?: QueryParamsType;
  /** format of response (i.e. response.json() -> format: "json") */
  format?: ResponseFormat;
  /** request body */
  body?: unknown;
  /** base url */
  baseUrl?: string;
  /** request cancellation token */
  cancelToken?: CancelToken;
}

export type RequestParams = Omit<FullRequestParams, "body" | "method" | "query" | "path"> & { isAlert?: boolean }

export interface DomainResponse {
    /** @example 200 */
    code?: number;
    data?: any;
    /** @example "OK" */
    message?: string;
}

type ExtractDataProp<T> = T extends { data?: infer U } ? U : never;

export interface ApiConfig<SecurityDataType = unknown> {
    baseUrl?: string;
    baseApiParams?: Omit<RequestParams, "baseUrl" | "cancelToken" | "signal">;
    securityWorker?: (securityData: SecurityDataType | null) => Promise<RequestParams | void> | RequestParams | void;
    customFetch?: typeof fetch;
}

export interface HttpResponse<D extends unknown, E extends unknown = unknown> extends Response {
    data: D;
    error: E;
}

type CancelToken = Symbol | string | number;

export enum ContentType {
    Json = "application/json",
    FormData = "multipart/form-data",
    UrlEncoded = "application/x-www-form-urlencoded",
    Text = "text/plain",
}

const pathnameWhiteList = ['/auth/login'];

const redirectToLogin = () => {
    const redirectAfterLogin = encodeURIComponent(
      location.href.replace(location.origin, '')
    );
    const search = `redirect=${redirectAfterLogin}`;
    const pathname = '/auth/login';
    window.location.href = [pathname, search]?.join('?');
  };

export class HttpClient<SecurityDataType = unknown> {
    public baseUrl: string = '';
    private securityData: SecurityDataType | null = null;
    private securityWorker?: ApiConfig<SecurityDataType>["securityWorker"];
    private abortControllers = new Map<CancelToken, AbortController>();
    private customFetch = (...fetchParams: Parameters<typeof fetch>) => fetch(...fetchParams);

    private baseApiParams: RequestParams = {
        credentials: 'same-origin',
        headers: {},
        redirect: 'follow',
        referrerPolicy: 'no-referrer',
    }

    constructor(apiConfig: ApiConfig<SecurityDataType> = {}) {
        Object.assign(this, apiConfig);
    }

    public setSecurityData = (data: SecurityDataType | null) => {
        this.securityData = data;
    }

    protected encodeQueryParam(key: string, value: any) {
        const encodedKey = encodeURIComponent(key);
        return `${encodedKey}=${encodeURIComponent(typeof value === "number" ? value : `${value}`)}`;
    }

    protected addQueryParam(query: QueryParamsType, key: string) {
        return this.encodeQueryParam(key, query[key]);
    }

    protected addArrayQueryParam(query: QueryParamsType, key: string) {
        const value = query[key];
        return value.map((v: any) => this.encodeQueryParam(key, v)).join("&");
    }

    protected toQueryString(rawQuery?: QueryParamsType): string {
        const query = rawQuery || {};  
        const keys = Object.keys(query).filter((key) => "undefined" !== typeof query[key]);
        return keys
                .map((key) =>
                    Array.isArray(query[key])
                    ? this.addArrayQueryParam(query, key)
                    : this.addQueryParam(query, key),
                )
                .join("&");
    }

    protected addQueryParams(rawQuery?: QueryParamsType): string {
        const queryString = this.toQueryString(rawQuery);
        return queryString ? `?${queryString}` : "";
    }

    private contentFormatters: Record<ContentType, (input: any) => any> = {
        [ContentType.Json]: (input:any) => input !== null && (typeof input === "object" || typeof input === "string") ? JSON.stringify(input) : input,
        [ContentType.Text]: (input:any) => input !== null && typeof input !== "string" ? JSON.stringify(input) : input,
        [ContentType.FormData]: (input: any) =>
            Object.keys(input || {}).reduce((formData, key) => {
                const property = input[key];
                formData.append(
                    key,
                    property instanceof Blob ?
                        property :
                    typeof property === "object" && property !== null ?
                        JSON.stringify(property) :
                    `${property}`
                );
                return formData;
            }, new FormData()),
        [ContentType.UrlEncoded]: (input: any) => this.toQueryString(input),
    }

    protected mergeRequestParams(params1: RequestParams, params2?: RequestParams): RequestParams {
        return {
            ...this.baseApiParams,
            ...params1,
            ...(params2 || {}),
            headers: {
                ...(this.baseApiParams.headers || {}),
                ...(params1.headers || {}),
                ...((params2 && params2.headers) || {}),
            },
        };
    }

    protected createAbortSignal = (cancelToken: CancelToken): AbortSignal | undefined => {
        if (this.abortControllers.has(cancelToken)) {
            const abortController = this.abortControllers.get(cancelToken);
            if (abortController) {
                return abortController.signal;
            }
            return void 0;
        }

        const abortController = new AbortController();
        this.abortControllers.set(cancelToken, abortController);
        return abortController.signal;
    }

    public abortRequest = (cancelToken: CancelToken) => {
        const abortController = this.abortControllers.get(cancelToken)

        if (abortController) {
            abortController.abort();
            this.abortControllers.delete(cancelToken);
        }
    }

    public request = async <T = any, E = any>({
        isAlert = true,
        body,
        secure,
        path,
        type,
        query,
        format,
        baseUrl,
        cancelToken,
        ...params
<% if (config.unwrapResponseData) { %>
    }: FullRequestParams  & { isAlert?: boolean }): Promise<ExtractDataProp<T>> => {
<% } else { %>
    }: FullRequestParams  & { isAlert?: boolean }): Promise<HttpResponse<T, E>> => {
<% } %>
        const secureParams = ((typeof secure === 'boolean' ? secure : this.baseApiParams.secure) && this.securityWorker && await this.securityWorker(this.securityData)) || {};
        const requestParams = this.mergeRequestParams(params, secureParams);
        const queryString = query && this.toQueryString(query);
        const payloadFormatter = this.contentFormatters[type || ContentType.Json];
        const responseFormat = format || requestParams.format || "json";

        let customHeaders = {};
        if (typeof window === 'undefined') {
            customHeaders = await getServerHeader();
        }

        return this.customFetch(
        `${baseUrl || this.baseUrl || ""}${path}${queryString ? `?${queryString}` : ""}`,
        {
            ...requestParams,
            headers: {
            ...customHeaders,
            ...(requestParams.headers || {}),
            ...(type && type !== ContentType.FormData ? { "Content-Type": type } : {}),
            },
            signal: (cancelToken ? this.createAbortSignal(cancelToken) : requestParams.signal) || null,
            body: typeof body === "undefined" || body === null ? null : payloadFormatter(body),
        }
        ).then(async (response) => {
              if (response.status === 401) {
                console.log('response 401:', response);
                if (typeof window === 'undefined') {
                    const pathname = await getServerPathname();
                    if (!pathnameWhiteList.includes(pathname)) {
                        const search = await getServerSearch();
                        redirect(`/auth/login?redirect=${encodeURIComponent(pathname +search)}`);
                    }
                    return
                }

                if (typeof window !== 'undefined') {
                    if (!pathnameWhiteList.includes(window.location.pathname)) {
                        if (response.status === 401) {
                            redirectToLogin();
                        }
                    }
                    return
                }
                

              }

              if (response.status === 403) {
                console.log('response 403:', response);
                if (typeof window === 'undefined') {
                    const pathname = await getServerPathname();
                    if (pathname !== "/block") {
                        redirect("/block");
                      }
                }
                if (typeof window !== 'undefined') {
                    const pathname = window.location.pathname;
                    if (pathname !== '/block') {
                        window.location.href = '/block';
                    }    
                }
                return Promise.reject(403)
              }

     
        
            if (response.status === 404) {
                if (typeof window === 'undefined') {
                    notFound();
                }
              }

            let data: any = {};
            
            try {
                data = await response[responseFormat]();
              } catch (error) {}

            if (cancelToken) {
                this.abortControllers.delete(cancelToken);
            }

<% if (!config.disableThrowOnError) { %>
    if (!response.ok || (data.code !== undefined && data.code !== 0) || (data.success !== undefined && !data.success)) {
        if (typeof window !== 'undefined') {
            const urlObj = new URL(response.url);
            if (urlObj.pathname !== '/api/v1/user/profile') {
              if (isAlert) {
                alert.error(
                  (data as DomainResponse).message! || response.statusText
                );
              }
            }
          }
          const errorMessage = { data, url: response.url, response }
          console.log('response error:', errorMessage); 
        throw errorMessage
      }
<% } %>
<% if (config.unwrapResponseData) { %>
            return data.data;
<% } else { %>
            return data;
<% } %>
        });
    };
}

export default new HttpClient({ baseUrl: process.env.TARGET }).request;